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Effects of Rare Earth on Austenite–Ferrite Phase Transformation in a Low-Carbon Fe–C Alloy

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

The influence of rare earth (RE) elements on austenite–ferrite phase transformation in Fe–0.14%C alloy has been investigated by in situ observing the nucleation, growth and morphology of ferrite using high temperature laser scanning confocal microscopy, and controlled atmosphere decarburization experiments. It is found that under the low-oxygen condition in steel, trace RE addition can significantly influence the nucleation, morphology and growth of ferrite in Fe–0.14%C alloy by the combined effects of RE slowing down the carbon diffusion and decreasing grain boundary energy by segregating at grain boundaries. This research provides evidences of adjusting the phase transformation and improving the mechanical properties of steels by RE addition.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation (No. 52031013).

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Authors and Affiliations

  1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China

    Fei Guo, Cheng-Wu Zheng, Pei Wang, Dian-Zhong Li & Yi-Yi Li

  2. School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China

    Fei Guo, Cheng-Wu Zheng, Pei Wang, Dian-Zhong Li & Yi-Yi Li

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  1. Fei Guo
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  2. Cheng-Wu Zheng
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  3. Pei Wang
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  4. Dian-Zhong Li
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  5. Yi-Yi Li
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Correspondence to Pei Wang or Dian-Zhong Li.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Guo, F., Zheng, CW., Wang, P. et al. Effects of Rare Earth on Austenite–Ferrite Phase Transformation in a Low-Carbon Fe–C Alloy. Acta Metall. Sin. (Engl. Lett.) 36, 141–146 (2023). https://doi.org/10.1007/s40195-022-01454-y

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  • DOI: https://doi.org/10.1007/s40195-022-01454-y

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